Pros
Working at LinkedIn so far has been such a life changing career choice. At my former company they knew the importance of culture, but had a hard time delivering on it. However, at LinkedIn culture is key. Everyone is so friendly; they want to make coming to work fun, and they live up to their value "Relationships Matter". Also, the growth opportunity within the company is remarkable - Please don't leave. It blew my mind to see how much internal growth they promote. It's a wonderful way to see many different sides of the business and find your niche.
Cons
We're growing so fast that sometimes it's hard to keep up with the changes. I don't think this is necessarily a con, but more of an adjustment for most people. Also, some of their benefits could improve like 401k.